/Engine/Source/Runtime/Core/Public/Math/Vector.h
Gets a normalized copy of the 2D components of the vector, checking it is safe to do so. Z is set to zero. Returns zero vector by default if vector length is too small to normalize.
Normalized copy if safe, otherwise returns ResultIfZero.
[TVector](API\Runtime\Core\Math\TVector)< T > GetSafeNormal2D ( T Tolerance, const [TVector](API\Runtime\Core\Math\TVector)< T > & ResultIfZero ) const